/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification of Java bytecode.
 *
 * Copyright (c) 2002-2018 GuardSquare NV
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not, write to the Free
 * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package proguard.io;

import java.io.*;

/**
 * This DataEntryWriter delegates to a given DataEntryWriter, each time adding a prefix of the written data entry name.
 *
 * @author Eric Lafortune
 */
public class PrefixAddingDataEntryWriter implements DataEntryWriter {
    private final String prefix;
    private final DataEntryWriter dataEntryWriter;

    /**
     * Creates a new PrefixAddingDataEntryWriter.
     */
    public PrefixAddingDataEntryWriter(String prefix, DataEntryWriter dataEntryWriter) {
        this.prefix = prefix;
        this.dataEntryWriter = dataEntryWriter;
    }

    // Implementations for DataEntryWriter.

    public boolean createDirectory(DataEntry dataEntry) throws IOException {
        return dataEntryWriter.createDirectory(renamedDataEntry(dataEntry));
    }

    public boolean sameOutputStream(DataEntry dataEntry1, DataEntry dataEntry2) throws IOException {
        return dataEntryWriter.sameOutputStream(renamedDataEntry(dataEntry1), renamedDataEntry(dataEntry2));
    }

    public OutputStream createOutputStream(DataEntry dataEntry) throws IOException {
        return dataEntryWriter.createOutputStream(renamedDataEntry(dataEntry));
    }

    public void close() throws IOException {
        dataEntryWriter.close();
    }

    public void println(PrintWriter pw, String prefix) {
        pw.println(prefix + "PrefixAddingDataEntryWriter (prefix = " + prefix + ")");
        dataEntryWriter.println(pw, prefix + "  ");
    }

    // Small utility methods.

    /**
     * Adds the prefix to the given data entry name.
     */
    private DataEntry renamedDataEntry(DataEntry dataEntry) {
        return new RenamedDataEntry(dataEntry, prefix + dataEntry.getName());
    }
}
